21110193612503 has 2 divisors, whose sum is σ = 21110193612504. Its totient is φ = 21110193612502.

The previous prime is 21110193612499. The next prime is 21110193612551. The reversal of 21110193612503 is 30521639101112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21110193612503 - 2² = 21110193612499 is a prime.

It is a super-2 number, since 2×21110193612503² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110193611503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555096806251 + 10555096806252.

It is an arithmetic number, because the mean of its divisors is an integer number (10555096806252).

Almost surely, 2^{21110193612503} is an apocalyptic number.

21110193612503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110193612503 is an equidigital number, since it uses as much as digits as its factorization.

21110193612503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The spelling of 21110193612503 in words is "twenty-one trillion, one hundred ten billion, one hundred ninety-three million, six hundred twelve thousand, five hundred three".